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Old April 19th 07, 09:59 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Analyzing Stub Matching with Reflection Coefficients

Keith Dysart wrote:
You are getting close to the truth. Yes, the forward and reverse
travelling waves are not necessarily moving energy.



How in the world is EM traveling waves existing without
energy getting close to the truth? Seems it is getting
closer to fantasy than anything else.

The Bird
wattmeter, despite its name, is computing a number with the
dimension of watts, but which does not necessarily represent
energy flowing (it represents flowing energy when the indicated
value is 0 in one direction or the other).


If the Bird is properly used, it indicates joules flowing
past a point in one second in the environment for which it
is calibrated. If EM energy waves ever stop flowing, they
cease to be EM waves. The boundary conditions for EM waves
will not permit them to travel at any other speed than
d(VF) nor exist devoid of energy.

This will probably (I understate) be hard to accept but is the
only reasonable conclusion after examining a large number
of experiments and trying to rationalize the answer
to "Where does the energy in the reflected wave go?" Once
it becomes clear that there is no good answer to that
question, the only possible conclusion is that the question
is invalid and the roots of its invalidity lie in the assumption
of energy in the reflected wave.


False, false, and false. *Every* EM wave is associated with ExB
joules/sec. The energy supporting a reflected EM wave is either
reflected or transmitted or dissipated. Those EM waves do not
care a whit if you never figure them out.
--
73, Cecil, w5dxp.com